KTLS-aware?

[Itsacon]

The 13.0-RELEASE announcement says this about the new in-kernel TLS framing/encryption:

Using KTLS requires the use of a KTLS-aware userland SSL library.

Is there a list which userland libraries have this awareness?

If there isn't, does anyone know if security/libressl can use this yet, or is it limited to (self-built) OpenSSL at the moment?